Device for argon arc welding seam back face blowing protection of titanium alloy annular radiator

Abstract

The invention discloses an argon arc welding seam back face blowing protection device for a titanium alloy annular radiator. The argon arc welding seam back face blowing protection device comprises a protection cover, steel wool and an air guide pipe which are arranged in the protection cover, and a rectifying plate arranged at the upper end in the protection cover. The protective cover is composed of a side plate and a bottom plate with holes, the end of the side plate is provided with grid teeth with bending radian, and the radian of the grid teeth is determined according to the cambered surface of the annular radiator. Protective gas enters the gas guide pipe through the gas inlet in the bottom of the gas guide pipe, passes through the flow dividing pipe and then is exhausted through the guide-out pipe with the exhaust holes, the protective gas is disturbed by the steel wool filled in the protective cover after being exhausted through the guide-out pipe, the disturbed protective gas is exhausted out of air in the protective cover, and finally the protective gas is evenly exhausted through the rectifying plate. Therefore, the back of the argon arc welding seam is protected from being oxidized. The bent grid teeth are arranged at the ends of the side plates and can be bent according to the cambered surface of the annular radiator, so that the protection device is attached to the back face of a weld joint needing to be protected, and protection is sufficient.

Description

Technical Field

[0001] The invention belongs to the technical field of titanium alloy argon arc welding weld protection, and in particular relates to a device for blowing air to protect the back side of the argon arc welding weld of a titanium alloy annular radiator. Background Art

[0002] Due to the activeness of titanium alloy, it starts to absorb hydrogen at temperatures above 200°C, oxygen at temperatures above 400°C, and nitrogen at temperatures above 600°C. It is very easy to react with gases in the air, causing a sharp drop in product quality. Therefore, it is very necessary to protect the welds of titanium alloys. In the existing method of back protection of argon arc welds of titanium alloy annular radiators, a blowpipe is used for tracking protection, which not only cannot ensure that the weld is in a protective atmosphere at all times, but also has a poor protection effect.

[0003] At present, there are usually three problems in the back protection of titanium alloy annular radiator argon arc welding:

[0004] 1. The protection area is small, and the weld leaves the protection area before the temperature drops above 200°C;

[0005] 2. Poor protection effect, resulting in a sharp decline in weld quality;

[0006] 3. The protective device does not fit well, which causes harmful gases to easily mix into the protected area when blowing air on the back of the titanium alloy argon arc welding weld.

[0007] The Chinese invention patent with the publication number CN214079745U discloses a double-sided argon protection device for friction stir welding of finned radiators, including a working platform, a support body with a rectangular structure is provided on the working platform, workpiece fixing devices are provided on both sides of the width of the support body, air inlets are provided at both ends of the length of the support body, the top surface of the support body has a workpiece support positioning surface, an exhaust hole is provided in the support positioning surface, and a sink is provided at the exhaust hole position. By designing the gas channel of the support body that fully accommodates the length of the weld, the welding area of ​​the two butted workpieces is in the full range of argon protection, effectively avoiding the generation of S-curve defects in the joint, thereby ensuring the strength of the weld joint; the structure is reasonable, the manufacture is simple, the positioning is convenient, the stability is high, and it is easy to clean and maintain. The structure of this device applied to the annular radiator will result in poor fit and insufficient protection.

[0008] In summary, the existing method of protecting the back side of the argon arc welding weld of titanium alloy annular radiator has many defects, resulting in extremely poor weld quality. Summary of the invention

[0009] In order to solve the above problems, the present invention aims to provide a device for blowing air to protect the back side of the argon arc welding weld of a titanium alloy annular radiator.

[0010] In order to achieve the above object, the present invention adopts the following technical scheme: a device for blowing air to protect the back side of the argon arc welding weld of a titanium alloy annular radiator, comprising a protective cover, steel wool and an air guide tube arranged inside the protective cover, and a rectifying plate arranged at the upper end of the inner part of the protective cover;

[0011] The protective cover is composed of a side plate and a bottom plate with holes. The end of the side plate is provided with a grating tooth with a curved curvature. The curvature of the grating tooth is determined according to the curved surface of the annular radiator.

[0012] Furthermore, the air guide pipe includes an inlet pipe and an outlet pipe, the inlet pipe and the outlet pipe are connected via a plurality of shunt pipes, and the outlet pipe is provided with a plurality of exhaust holes radially around.

[0013] Furthermore, the shunt pipe is connected to the inlet pipe and the outlet pipe by argon arc welding.

[0014] Furthermore, the air duct of the air duct is inserted into the hole of the bottom plate of the protective cover to be connected with the external protective gas.

[0015] Furthermore, except for the space occupied by the air duct, the rest of the area inside the protective cover is filled with steel wool.

[0016] Furthermore, a rectifier plate is horizontally arranged on the upper end surface of the steel wool filling area, and the rectifier plate is arranged in the lower area of ​​the side plate grid teeth of the protective cover to form a closed area with the inside of the protective cover.

[0017] Furthermore, a plurality of strip-shaped grooves are evenly distributed on the rectifying plate.

[0018] Compared with the prior art, the present invention has the following advantages: the device solves the problem of oxidation on the back of the weld during argon arc welding of titanium alloys, and improves the quality and reliability of the weld of the product, mainly as follows:

[0019] 1. The shielding gas enters the air duct from the air inlet at the bottom of the air duct, passes through the diverter pipe and is discharged from the outlet pipe with an exhaust hole at the top. After being discharged from the outlet pipe, the shielding gas is disturbed by the steel wool filled in the protective cover. The disturbed shielding gas discharges the air in the protective cover and is finally discharged evenly through the rectifier plate, thereby protecting the back of the argon arc welding weld from oxidation.

[0020] 2. The end of the side plate is provided with curved grating teeth, which can be bent according to the arc surface of the annular radiator, so that the protective device fits the back of the weld that needs to be protected, so as to provide adequate protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the specific embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 This is a front view of the gas blowing protection device on the back of the argon arc welding weld of the titanium alloy annular radiator;

[0023] Figure 2 It is a top view of the gas blowing protection device on the back of the argon arc welding weld of the titanium alloy annular radiator;

[0024] Figure 3 It is a side view of the gas blowing protection device on the back side of the argon arc welding weld of the titanium alloy annular radiator;

[0025] Figure 4 A top view of the protective cover of the present invention;

[0026] Figure 5 It is a partial detail diagram of the side plate of the protective cover in the present invention;

[0027] Figure 6 It is a front view of the air guide tube in the present invention;

[0028] Figure 7 is a side view of the airway tube of the present invention;

[0029] Figure 8 for Figure 6 AA section view in;

[0030] Fig. 9 A top view of the rectifier plate in the present invention;

[0031] Fig.10 It is a side view of the rectifying plate in the present invention;

[0032] In the figure, 1-protective cover; 2-steel wool; 3-air guide pipe; 4-rectifier plate; 5-side plate; 6-bottom plate; 7-diverter pipe; 8-export pipe; 9-inlet pipe. DETAILED DESCRIPTION

[0033] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments, but it should not be understood that the scope of the subject matter described in the present invention is limited to the following embodiments. Without departing from the above-mentioned technical ideas of the present invention, various modifications, substitutions and changes made according to the common technical knowledge and customary means in the field are included in the scope of the present invention.

[0034] The titanium alloy annular radiator has a complex structure. During argon arc welding, the back of the weld is mainly protected by a blowpipe. However, due to the activeness of titanium alloy, oxidation reaction is very likely to occur during argon arc welding if protection is not in place, which reduces product quality. The back of the weld is protected by a argon arc welding weld back protection cover to solve the problems of small protection area and poor protection effect on the back of the weld during argon arc welding of existing titanium alloy annular radiators.

[0035] like Figure 1-3 As shown, the back side gas blowing protection device of the argon arc welding weld of the titanium alloy annular radiator includes a protection cover 1, steel wool 2, an air guide pipe 3 and a rectifying plate 4. Figure 4 The protective cover 1 is composed of four side panels 5 and a bottom panel 6. The side panels 5 are as shown in FIG. Figure 5 As shown. The airway 3 is as shown Figure 6-8 As shown. Figure 9-10 shown.

[0036] When the protection device is working, the protection device is placed close to the back of the welded area, and the shielding gas enters the air guide pipe 3 from the inlet pipe 9 at the bottom of the air guide pipe 3, and is discharged from the outlet pipe 8 with exhaust holes on the top after passing through the three-way shunt pipe 7. After being discharged through the outlet pipe 8, the shielding gas is disturbed by the steel wool 2 filled in the protective cover, and the shielding gas after the disturbance is discharged from the air in the protective cover 1, and finally discharged evenly through the rectifying plate 4, thereby protecting the back of the argon arc welding weld from oxidation.

[0037] The protective cover 1 is composed of four side panels 5 and a bottom plate 6 with holes. The connecting parts are fixed by argon arc welding. The ends of the side panels 5 are provided with curved grating teeth, which can be bent according to the curved surface of the annular radiator so that the protective device fits the back of the weld that needs to be protected.

[0038] The inlet pipe 9 of the air guide pipe 3 is connected to the external protective gas through the hole on the bottom plate 6 of the protective cover 1.

[0039] Except for the air guide tube 3, the rest of the interior of the protective cover 1 is filled with steel wool 2.

[0040] The air guide pipe 3 is connected with the inlet pipe 9, the shunt pipe 7 and the outlet pipe 8 by argon arc welding, and the outlet pipe 8 is provided with air guide holes in radial directions.

[0041] The above is a detailed introduction to the device for back-side gas blowing protection of the argon arc welding weld of a titanium alloy annular radiator provided by the present invention. This article uses specific examples to illustrate the structure and working principle of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, the present invention can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A device for back-blowing protection of argon arc welding weld of titanium alloy annular radiator, characterized in that: It comprises a protective cover (1), steel wool (2) and an air guide tube (3) arranged inside the protective cover (1), and a rectifying plate (4) arranged at the upper end inside the protective cover (1); The protective cover (1) is composed of a side plate (5) and a bottom plate (6) with holes. The end of the side plate (5) is provided with a grating tooth with a curved curvature. The curvature of the grating tooth is determined according to the curved surface of the annular radiator.

2. The device for back-side gas blowing protection of argon arc welding weld of titanium alloy annular radiator according to claim 1 is characterized in that: The air guide pipe (3) comprises an inlet pipe (9) and an outlet pipe (8), the inlet pipe (9) and the outlet pipe (8) are connected via a plurality of shunt pipes (7), and the outlet pipe (8) is provided with a plurality of exhaust holes in the radial direction.

3. The device for back-side gas blowing protection of argon arc welding weld of titanium alloy annular radiator according to claim 2 is characterized in that: The shunt pipe (7) is connected to the inlet pipe (9) and the outlet pipe (8) by argon arc welding.

4. The device for back-side gas blowing protection of argon arc welding weld of titanium alloy annular radiator according to claim 1 is characterized in that: The inlet pipe (9) of the air guide pipe (3) is inserted into the hole of the bottom plate (6) of the protective cover (1) and connected to the external protective gas.

5. The device for back-side gas blowing protection of argon arc welding weld of titanium alloy annular radiator according to claim 1 is characterized in that: Except for the space occupied by the air duct (3) inside the protective cover (1), the rest of the area is filled with steel wool (2).

6. The device for back-side gas blowing protection of argon arc welding weld of titanium alloy annular radiator according to claim 1 is characterized in that: A rectifying plate (4) is horizontally arranged on the upper end surface of the steel wool (2) filling area. The rectifying plate (4) is arranged in the lower area of ​​the grating teeth of the side plate (5) of the protective cover (1) to form a closed area with the interior of the protective cover (1).

7. The device for back-side gas blowing protection of argon arc welding weld of titanium alloy annular radiator according to claim 1 is characterized in that: The rectifying plate (4) is evenly provided with a plurality of strip-shaped grooves.

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